#include <iostream>

class Foo {
  int a_ = 10;
  int const b_ = 20;
  int c_ = 30;
  int d_ = 40;
  std::string e_;

public:
  Foo(std::string const &str) : e_{str} {}
  Foo(std::string const &str, int c, int d) : e_{str}, c_{c}, d_{d} {}
};

int main(int argc, char *argv[]) {
  std::cout << "==== ch01 p04 ====" << std::endl;
  Foo f{"hello"};
  return 0;
}
